Integration Of Fuzzy Logic Control Into Continuous Passive Motion Machines

Abstract

Thirty-five years ago, a method for approaching classes of problems having a continuum of grades of membership was developed by Zadeh (1965).  Although Zadeh recognized the potential use of this fuzzy logic-based method within the medical profession, its current use in this field has been limited when compared to other scientific disciplines (Steimann, 1997).  This paper builds on the existing literature in the medical discipline by applying fuzzy logic to a particular sub-discipline: physical therapy.  More specifically, this paper presents a fuzzy logic inference engine that controls a continuous passive motion (CPM) device for use with Total Knee Arthroplasty (TKA) patients post surgery.